Querying the Characteristics of a Transparent Overlay Window

You can determine whether a window is an overlay window using the
routine XSolarisOvlIsOverlayWindow. You can also determine a GC's current paint type using
the routine XSolarisOvlGetPaintType.

Determining Whether a Window is an Overlay Window

You can use the routine XSolarisOvlIsOverlayWindow to determine whether a window is
an overlay window. The routine returns True if the given window w
is a transparent overlay and returns False otherwise.

Bool
XSolarisOvlIsOverlayWindow (Display *display, Window
w)

display

Specifies the connection
to the X server.

w

Specifies the window.

Determining the Paint Type of a Graphics Context

The routine XSolarisOvlGetPaintType returns the GC's current paint type.